1 The LLC must pay a fee if the California total income is equal to or greater than $250,000. 2  The LLC must estimate the fee it will owe for the year and make an estimated fee payment. 3  See Estimated Payments below.
Ligand Definition. A ligand is an atom, ion, or molecule that donates or shares one or more of its electrons through a covalent bond with a central atom or ion. It is a complexing group in coordination chemistry that stabilizes the central atom and determines it reactivity.
ligand. [ligâ²Énd, lÄ«â²gÉnd]. Etymology: L, ligare, to bind. 1 a molecule, ion, or group bound to the central metal atom of a chemical compound, such as the oxygen molecule in oxyhemoglobin, which is bound to the central iron atom. 2 an organic molecule attached to a specific site on a cell surface or to a tracer element.n organic molecule attached to a tracer element, for example, a radioisotope. 3. A molecule that binds to a macromolecule, for example, a ligand binding to a receptor. 4. The analyte in competitive binding assays, such as radioimmunoassay.